Which type of chemical bond is usually the strongest?
A. Van der Waals
B. Covalent
C. Ionic
Answer: B
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The most preferable approach to municipal waste management, by far, is
A. reuse. B. recycling. C. reduction of production.
Complete the concept map by selecting the correct responses from the lists provided. 
Complete the concept map by selecting the correct responses from number 1.
A. Foci B. Cracks in the crust C. Vibrations D. Epicenters
Explain the differences between the floral assemblage of the tropical deciduous biome to that of the tropical rainforest
What will be an ideal response?
How can tree rings provide information about past climates?
A) Thickness and spacing of tree rings reflect environmental conditions B) Tree rings turn colors depending on the climate C) Tree rings trap gas bubbles that can be used to interpret atmospheric conditions D) Tree rings can measure past CO2 concentrations